#![allow(unused)]
pub fn main() {
    // let mut s1 = String::from("foo");
    // let s2 = "bar";
    // s1.push_str(s2);
    // println!("s2 is {}", s2);
    let hello = "我是谁";
    let answer = &hello[0..3];

    //print!("{:?}", answer);

    // for c in "我是谁".chars() {
    // println!("{}", c);
    //  }

      for c in "我是谁".bytes() {
    println!("{}", c);
     }


   }
